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Finding the Fourth Proportional to 1,873.60, 2,810.74 and 778.04

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Solution

The fourth proportional to 1,873.60, 2,810.74 and 778.04 is: 1,167.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873.60 : 2,810.74 = 778.04 : x
  2. Step 2: Convert to fraction form
    1,873.60/2,810.74 = 778.04/x
  3. Step 3: Cross multiply
    1,873.60x = 2,810.74 × 778.04
  4. Step 4: Simplify right side
    1,873.60x = 2,186,868.15
  5. Step 5: Solve for x
    x = 2,186,868.15/1,873.60
  6. Step 6: Final answer
    x = 1,167.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.